Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd417e8426f475a8…

MALICIOUS

PDF

34.7 KB Created: 2021-06-25 09:55:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 35f2422d626640f4c46b529ad31db6ca SHA-1: 502689baf4ee17a82964b97a8724f7dfa293639b SHA-256: fd417e8426f475a87c145fcb206006618347095a29a78ddb9164f70aa6a75f0f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a malicious redirector link, specifically advertising a 'free generator / game hack'. The embedded URL, http://netcdn.co/app/431946152/free-roblox-exploit-that-lets-you-use-gears-game-hack, is the primary indicator of this malicious activity. The document body also contains this URL, reinforcing the lure. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/431946152/free-roblox-exploit-that-lets-you-use-gears-game-hack In PDF document text
    • https://dr-willmer.de/images/pokemon-go-free-862_GM1094591345.pdfIn PDF document text
    • https://dr-willmer.de/images/free-roblox-users-with-robux_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • https://dr-willmer.de/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/proxo-cheat-roblox-download_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/god-mode-roblox-cheat-engine-hack_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/robux-hacks-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/como-hackear-roblox-para-tener-robux-2021-pc_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • https://dr-willmer.de/images/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://dr-willmer.de/images/roblox-install-free_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/admin-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/roblox-prison-life-gui-hacks_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/roblox-online-roblox-hack_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/is-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002e87.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E87 22600 bytes
SHA-256: 3640e771290617a3141ac3479bcc7ee843b78002b8e05cc2a60e9185e656678c
font_01_sfnt_off00006123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6123 19520 bytes
SHA-256: 9127ac8aa8859aea8bad567a241d2ff8da72b45a87a04182ded843f445fbdf9a

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